Traffic Signal Sequencer, 12VDC and LEDs... please help!

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  #1  
Old 01-20-12, 12:15 PM
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Traffic Signal Sequencer, 12VDC and LEDs... please help!

So I am working on a wearable traffic signal costume for Halloween this year. A real, working LED traffic signal.

I have the following 8 AA battery holder with leads:


I have wired that into a 12VDC traffic signal sequencer as seen here:


Then, I have three LED signals from GE, each with about 12 individual LEDs in them. The back of the signals tell you the wattage of each, the red and green are each 5W and the yellow is 14W.
[IMG]http://i39.************/258321f.png[/IMG] (replace *** with tinypic)


The 12VDC sequencer has up to 120VAC output, which the LED signals are.

When I connect everything together, the sequencer is working, and "clicking" when cycling through the three outputs. But the LEDs are not lighting up!

Are the 8 AA batteries not enough power for the three signals? How many amp-hours in a 12VDC battery do I need? Should I try a 12VDC sealed-lead battery with about 5 amp hours? Suggestions?? Please help, thanks!
 
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Old 01-20-12, 12:41 PM
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The LED's are 120vac? So you need to provide them with 120vac then.

It's the voltage for the LED's that you need.
 
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Old 01-20-12, 12:50 PM
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Correct, the sequencer I have is converting the 12vdc input to 120vac output (at least thats what the specs on it indicate). That part should be OK... it's the amount of power that I think is the issue.
 
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Old 01-20-12, 01:00 PM
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Unless the sequencer has transformer capabilities, it isn't producing more voltage than you are inputing. You would have to invert the DC to AC anyway. In addition, you don't want 120 volts strapped to your butt at haloween in any shape or form. Little rain or sweat, loose connection and fried pumpkin
 
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Old 01-20-12, 07:30 PM
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I'm thinking the board itself operates on 12V, operating the relays which are rated to SWITCH 120V.
 
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Old 01-20-12, 07:42 PM
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You're going to need to get an inverter and a sealed lead-acid battery to do this. From personal experience, you may also want a wheeled book-bag or else you'll have a sore back in the morning!
 
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Old 01-21-12, 04:20 AM
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The Red, Yellow, and Green terminals are dry contacts off the relays. They don't supply any voltage to the LEDs. The replay outputs require their own power source, and since they are nothing but switches the power can be either 120VAC or any of the common voltages of DC.

If you want to run the LEDs off the batteries you need to buy different LED packs designed to operate on 12 volts.

See the wiring diagram here:
http://www.joezgarage.com/sync-DCinstructions.pdf

Here's a link to lamp examples:
3610-x4 Festoon Bulb Specifications

Scroll down this page for Festoon Bulb sockets:
Super Bright LEDs ? Festoon Light Bulbs
 
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Old 01-21-12, 12:45 PM
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Thanks!

Rick, thank you very much, that all makes some sense. So if I were to find the same style of red, yellow and green LED signals but in 12vdc as opposed to 120vac, they should work, correct? Thanks again for helping this noob out.
 
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Old 01-22-12, 07:29 AM
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Yes, they will work. If they don't, flip them around in the socket. LEDs are polarity sensitive. (Some festoon LED lamps are not polarity sensitive and will say that on the package or website.)
 
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